ul {
  list-style: none;
}

.content {
  width: 750px;
  margin: 0 auto;
}

body {
  background-color: #f7f8fa;
}

.el-card {
  margin-bottom: 20px;
}

.el-card__header-no-border .el-card__header {
  border-bottom: 0;
  padding-bottom: 0;
}